Feed-water heater for boilers.



F. D. PATTBN. FEED WATER HEATER FOR BOILERS.

APPLICATION FILED MAB..5. 1914. 1,121,755. Patented Dec. 22, 1914.

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F. D. PATTEN. FEED WATER HEATER FOR BOILERS.

APPLICATION FILED MAR.5, 1914. 1,121,755, Patented Dec. 22, 1914.

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3 wucwtoa w-Mm flarzp'rvfi FQZZ6% gm 33 Mares-15 PETERS C04 PHOTO-LITHLWASHING VON 1* scription of FRANKLIN D. PATTEN, OF PORTLAND, OREGON.

FEED-WATER HEATER FOR BOILERS.

Specification of Letters Patent.

Patented Dec. 22, 1914.

Application filed March 5, 1914. Serial No. 822,676.

To all whom, it may concern Be it known that I, FRANKLIN D. Parrnx, acitizen of the United States, residing at Portland, in the county ofMultnomah and State of Oregon, have invented certain new and usefulImprovements in Feedater Heaters for Boilers; and I do declare thefollowing to be a full, clear, and exact dethe invention, such as willenable others skilled in the-art to which it appertains to make and usethe same.

This invention relates to improvements in boilers and more particularlyto attachments for heating the feed water before the same is injectedinto the boiler.

The primary object of the invention is to provide a device of thecharacter described. which may be located in the breeching of a boilerand which, when in this position, will be subjected to a great amount ofheat which would otherwise escape without being utilized.

A secondary object of the invention is to construct the attachment insuch a manner as to cause a continuous circulation of water through thesame, thus obviating any danger of overheating.

Still another object is to provide means whereby any sediment may bereadily ex hausted from the heating coil of the device.

With the above objects in view, the invention resides in certain'novelfeatures of construction and combination herein described and claimedand shown in the drawings wherein:

Figure 1 is a side elevation partly in section, of a return tube boilershowing the application of my invention within the breeching thereof;Fig. 2 is a vertical transverse section on the line 22 of Fig. 1; Fig. 3is a horizontal section on the line 33 of Fig. 1; and Fig. 1 is a sideelevation partly in section showing the application of the invention toa different form of boiler.

In the accompanying drawings, the letter B designates broadly a returntube boiler which comprises the usual water chamber C through which thereturn tubes T extend, a fire box F, above a suitable grate G, an ashpit P below said grate, a draft flue D extending beneath the major partof the water chamber 0 and rising in front thereof in communication withthe tubes T, a

breeching or smoke receptacle B. in com:

munication with the opposite ends of said tubes and a suitable stack Sdischarging from said breeching.

Within the breeching B is disposed my improved feed water heater whichis in the form of a horizontal coil 1 rigidly supported upon suitablebrackets 2 which are secured to the opposite side walls of saidbreeching. The inlet end 3 of the coil 1 passes through one side of thecasing around the breeching B and is connected bymeans of a T-couplingwith a feed pipe 5 and with a circulating pipe 6, the latter dependingfrom said T'-coupling, and thence extending horizontally as shown at 7and entering the bottom of the water chamber C at the point 8. Thehorizontal portion 7 of the pipe 6 is provided with a check valve 9which opens outwardly from said water chamber C and with a suitableglobe or cut ofi-valve 10. The feed pipe 5 is connected in anyappropriate manner with the injector (not shown) and is preferablyprovided'with a suitable cut off valve 11. The discharge end 12 of thecoil 1 passes through the opposite side of the casing surrounding thebreeching B and is connected by a T-coupling 13 with a blow off pipe 14and with a circulating pipe 15, pipe 6, has its lower portion extendinginwardly, in a horizontal plane as shown at 16 and in communication withthe interior of the boiler at the point 17. The horizon; tal portion 16is provided with a check valve 18 which opens toward the discharge endof the pipe 16 and with'a globe valve 19, while the upright portion 15is provided with a suitable stop cook 20 and with a globe valve which,like the circulating 21. The blow off pipe 1 L is provided with a esuitable globe valve 22 for a purpose to appear.

The operation scribed, is as follows: All of the'valves and of theinvention, so far de- 7 cocks, with the exception of the globe valve 7ofi, however, the r Weight of the water within the boiler and thepressure ofethe steamtherein, will (cause the check valve 18 to closewhilethe check valve 9 will be opened and the water will rise within thepipe 6 and pass into the coil 1 where it will again be heated Since theflow of the water from the coil, through'the pipe 6, is automaticallycut off by the check valvefi), said "water will be forced to travelthrough the pipe 15 and the check valve 18 and back into the boiler.This operation iis ontinuous as long as the valves 10 19, Q9 -2-1 iareopen, ilIldyELS long as the valve 22 is closed. WVhen, however, itbecomes HQ 'GSSQry to cleanse the interior of the coil 1, it is simplynecessary to -close the stop "20 or the globe -,valve -21 and open thenalve =22, whereupon, the return communination fron1 the-vcoil l and thelower side of theiboile will be cut oil (and communication oviilgltbeestablished between said coil and the gl IlQWtOfi gpipe il through whichthe Water will noW tbeqdisoharged, thereby removing any sediment whichmay have collected in said coil. The globe valves 10, 18 and 21 areprjovidged {more dior the purpose of regulating the amount of water to:be circulated than dior'the purpose of using them to entirely pneventfsaid ,circulatiion.

4 I have shown my invention as applied to a slightly different form ofboiler B", which is provided on its under with amtld tank or receptaclewith which the {discharge end 117 of the horizontal pqnt ion :16 of thecirculating pipe '15 communicates, .said pipe :16 being provided with acheck ave-Ive l8 and a globe value 1 the generations of which are thesame as theitlof the yailves {l8 and 19- above described. The remainderof the construction is precisj'elzy the same as that illustrated in thefirst three figures of the drawings, and further description andillustration thereof is not thought to be necessary.

1 g hatze ShQWil my invention as applied to two types of boilers, but itwill be readily understood that :I need not, be limited to thesepantioular applications, .since the intention would {operate to equaladvantage with any te m of boiler having a 'tbreeching adaptable for theherein mentioned puroses.

From the foregoing description, taken in connection with theaccompanying drawings, the construction and operation of the inventionwill be readily understood Without requiring'a more extendedexplanation. "It may be well, however, to give a detail explanation ofthe manner in which the blow off pipe is employed In using this pipe,one of the valves 20, 21 or 19 is closed while the valve 2-2 is opened,thus preyenting water, forced through l the pipe 6 and the coil 1 iiromreturning to the boiler, the result being that this water is forced todischarge through the blow :off pipe 14 thereby ave gi g e o 1 en else ro g any mud or sediment firom the boiler.

Ha ing esc ib d y ve tion, Wha I claim as new ,and dGSH'fi to secure byLetters-Patent, is:

The combination with a boiler having a i I smoke box in one end, anumber of smoke flues communicating with the lower portion of said smokebox, and ia smoke stack "leading from the smoke :box, of :a pair ofsuping pipes, a water feed pipe in va lned comnntnication with one endof said ,coil and a blow 0J3? pipe in valved communication with theopposite end thereof, one of said check valves opening toward said coiland the other opening away theiefrom. y

(In {testimony whereof l have hereunto set my hand in .presen'ce of twosubscribing witnesses.

FRANKLIN D. PATTEN. wi n a John A. Bnnssrns, ;S. SIsL Y.

Copies of this patent may be obtained for five cents each, biyaddressing the flomngissioner of ratents Washington, D. 3;.

